Cyclopropanetrione or trioxocyclopropane is a little-known oxide of carbon with formula C₃O₃. It consists of a ring of three carbon atoms each attached to an oxygen atom with a double bond. Alternately, it can be thought as a trimer of

carbon monoxide Carbon monoxide (chemical formula CO) is a colorless, poisonous, odorless, tasteless, flammable gas that is slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the simple ...

. This compound is thermodynamically unstable and has not been produced in bulk. However, it has been detected using mass spectrometry. It is the neutral equivalent of the deltate anion C₃O₃²⁻, known since 1975. An equivalent hydrate hexahydroxycyclopropane or cyclopropane-1,1,2,2,3,3-hexol, (-C(OH)₂-)₃ also exists. This contains

geminal In chemistry, the descriptor geminal () refers to the relationship between two atoms or functional groups that are attached to the same atom. A geminal diol, for example, is a diol (a molecule that has two alcohol functional groups) attached t ...

hydroxy groups.

References

{{Oxides of carbon Oxocarbons Cyclopropanes Triketones Cyclic ketones Conjugated ketones